An obligate parasite, or holoparasite, is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host.
Part of the Andes mountain range, Aconcagua is the second highest of the Seven Summits, behind only Mount Everest in Asia. At 22,837 feet (6,961 meters), not only is it the highest mountain in South America, it is the tallest peak in all of the Americas as well as the Southern and Western Hemispheres.
Mount McKinley (or Denali) in Alaska is the highest mountain peak in the United States and in North America, with a summit elevation of 20,320 feet (6,194 m) above sea level.Measured base-to-peak, it is the tallest mountain on land.concagua is the highest mountain in the Americas at 6,959 m (22,841 ft). It is located in the Andes mountain range, in the province of Mendoza, Argentina. The summit is also located about 5 kilometres from San Juan Province and 15 kilometres from the international border with Chile.